Tack driver



Patented Nov. 19, 1929 UNITED STATES STANLEY TATAR, OF DETROIT, MICHIGAN TACK DRIVER I Application inea vrime 14, 192s. serial No. 235,283.

My invention relates to a new and useful improvement in a` tack driver, and has for its object the provision of a tack driver of this class which will be simple in structure, economical of manufacture and highly etlicient in use.

Another object of the invention is the provision of an electrically driven tack driver.

Another object of the invention is the 1 provision of an electrically operated means Y, y for' driving the. tack and for fitting a tack strip into proper position for driving.

Another object of the mvention 1s the provision of means for retarding the tack carry- 71-5. ing-strip during the driving operation.

Other objects will appear hereinafter. "The, invention consists in the combination and arrangement of parts hereinafter described and claimed.

The invention will be best understood by a reference'to the accompanyin drawings which form a part of this specification and in which,

Fig. 1 is a side elevational view 0f the invention with a part broken away and parts shown in section.

Fig. 2 is a view taken on line 2 2 of Fig. 1.

Fig. 3 is a sectional view taken on line 3*-3- 0f Fig. 4 is a sectional view taken on line 4 4 of Fig. 1.

Fig. 5 is an enlarged fragmentary view of Fig. 3.

Fig. 6 is a fragmentary view taken on line 6-6 of Fig. 5.

Fig. 7 is a fragmentary perspective view of the tack carrying strip.

The invention comprises the casing or 4o housing 9 having a handle 10 projecting downwardly therefrom to resemble in general contour a'pistol. A finger guard 11 extends around the trigger 12 which is pivotally mounted on the casing and provided with a rearwardly extending heel 13. A bracket 14 serves to engage one end of a spring 15, the other end 0f which engages in a recess formed in the heel 13 and serves to normally retain the trigger 12 in the position shown in Fig. 1.

Projected through the handle 10 is ai'lexil ble'shaft 15 which connects to a shaft 15 on which is fixedly mounted a bevel gear 18 adapted to mesh with the gear 19 which is ixedly mounted on the shaft 20. Pivotally 55 connected at one end to the heel 13.. is an arm 16, the angularly turnedend 16 of which is formed as a yoke to embrace the bushing 'or collar 17. The construction and arrangement is such that upon a'rocking of the trig- 60 ger 12 the gear 18 may be moved into mesh and out of mesh with the gear 19, this gear being normally retained in mesh through the pressure of the. spring 15 on the trigger 12.- In beginning the operation the trigger 12 65 would be rocked so as to disengage the gear 18 from the gear 19, upon which the flexible shaft 15 would be set into operation. A releasing of the pressure on the trigger 12 would then permit a movement of the gear 18 into mesh with the gear 19.

Fixedly mounted on a shaft 20 is a gear 20 adapted to mesh with a gear 21. Connected eecentrically, at one end, to one face of the gear 21 is an arm 22 which is pivotally 75 connected at its opposite end to a bell crank 23 which is roekingly mounted in the housing 9. The opposite end of the bell crank is connected -by a ball and socket arrangement to an arm 24 which is pivotally connect- 80 ed at its opposite end to a disc 25 positioned interiorly of a ring 27 having internal ratchet teeth formed thereon. A dog 26 is mounted on the disc 25 and adapted to engage the ratchet teeth ofthe ring 27.

The ring 27 is iiXedly mounted on the shaft 27 which extends through the bracket 27 and is also journalled in the wall 44 of the casing 9. Fixedly mounted on the shaft 27 is a roller 28 which rotates in unison there- 90 with. Rollers 29 are mounted in the casing 9, as are likewise rollers 30, 31 and 32, these rollers engaging opposite sides of the tack carrying strip 33 which is doubled upon itself at its medial line to provide the outwardly 95 extending tack carrying portion 34, through which are projected tacks or other similar securing means 35.

Meshing with the gear 21 is a gear 36 adapted to effect a rotation of a crank 37 100 in engagement with the various rollers'menfwhich is pivotally connected to-one end to the link 38, the other end of the link being pivotally connected to the plunger or driving member 39. This driving member 39 is lprovided on itsunder surface with a dovetailed projection 40 engaging in a dovetailed groove formed in the bracket 41 mounted on the side wall of the housing 9.

The strip 33 is led throu h registration openings 45 and 46 formed 1n the top and bottom of the housing respectively. An opening 43 is formed in the forward wall 44 of the housing, Rollers 42 serve to' engage opposite sides of the plunger or driving member 39.

In operation, after the strip has been placed tioned and the shaft 15 is set into rotation, the rocking of thevtrigger 12 will bring the gear 18 into mesh with the gear 19, effecting a rocking of the bell crank 23. This will cause a reciprocation of the disc 25, the disc 25 in moving in one direction, effecting a rotation of the ring 27 and the roller 28, this roller 28 serving as a feed roller. The movement of the ring 27 is such that the strip 30 will be fed by the roller 28 downwardly at each operation a distance equal to thespace between the tacks 35, so that, after each movement, the strip 33 will be in a position to bring one of the tacks`35 into registration with the opening 43. At the same time, the gear 36 is set into rotation to effect reciprocation of the plunger or driving member 39 which will tear the tack 35 from the strip and force it outwardly through the opening`43, thus driving it into the material in which it is desired to drive the same.

In view of the weight of the casing and the mechanism therein, sufficient weight is provided to resist the reaction incident to the driving of the tack 35 so that an eflicient and rapid operating machine is provided.

With a machine constructed in this man'- ner, ease and speed in driving tacks and other securing means is effected, and the driving of tacks into comparatively inaccessible positions becomes possible without the marring of. baseboards or other defaceable articles adjacent thereto.

While I have illustrated and described the preferred form of my invention, I do not wish to limit myself to the precise details of structure shown, but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. In a tack driver of the class described: a housing; driving mechanism in said housing; feeding mechanism in said housing; a gear for operating said driving mechanism and said feeding mechanism; a flexible shaft for rotating said gear, said shaft projecting out- .wardlyfrom said housing, said gear being tion; a rockable member for moving said gear to operative and inoperative position; an'd a spring for normally retaining said gear in operative position.

3. In a tack driver of the class described; a housin a rotatable gear; a sli'dably mounted riving member; connecting means for connecting one endof said vdriving member eccentrically of said gear for effecting reciprocation of said driving member upon rotation of said gear; and rollers engageable with opposite sides of said'driving member.

4. In a tack driver of the class described, having a. feeding mechanism and a driving mechanism: a movable gear for 'operating said feeding and said driving mechanism, said gear being movable to operative or inoperative position; a lever pivotally mounted in said housing, intermediate its ends, and connected at one end to said gear, the rocking of said lever effecting a movement of said gear to operative and inoperative position; and a rockable member pivotally connected at one end to said lever for effecting a rocking of the same.

5. In a tack driver of the class described, having a feeding mechanism and a driving mechanism: a movable gear for operating said feeding and said driving mechanism, said gear being movable to operative or inoperative position; a lever pivotally mounted in said housing, intermediate its ends, and connected at one end to said gear, the rocking of said lever effecting a movement of said gear to operative and inoperative position; a rockable member pivotally connected at one end to said lever for effecting a rocking of the same; and resilient means for normally resisting rocking movement of said rockable member.

In `testimony whereof I have signed the foregoing specification.

, STANLEY TATAR.

llO 

